The Raiders were reportedly one of eight teams to place a waiver claim on safety D.J. Swearinger, who was released by the Houston Texans on May 11.
Along with Oakland, the Tampa Bay Buccaneers, Jacksonville Jaguars, New York Jets, Atlanta Falcons, Buffalo Bills, Pittsburgh Steelers and Baltimore Ravens all put in claims, attempting to add Swearinger, according to a national report.
The Buccaneers, with top priority, landed the 23-year-old safety.
Swearinger was a second-round pick (No. 57 overall) in the 2013 NFL Draft, taken by the Texans.
He was the fifth safety selected in that class, after Texas' Kenny Vaccaro (Saints), LSU's Eric Reid (49ers), Florida's Matt Elam (Ravens) and FIU's Jonathan Cyprien (Jaguars).
The 5-foot-11, 208-pound hard-hitting safety played in all 32 games for Houston, starting 22 since being drafted. Swearinger racked up 144 total tackles over two seasons, along with one sack, three interceptions, 10 pass deflections and four forced fumbles.
Charles Woodson and Nate Allen are expected to lead a group at safety for the Raiders in 2015 that also includes Larry Asante, Jonathan Dowling, Brandian Ross, Jimmy Hall, Tevin McDonald and Terrell Pinson.